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Marquise|Natural|GIA

1.20ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 5563217302

Certificate GIA 5563217302

Diamond specifications and retailer prices

From £3,075 GBP
As of November 1, 2026
Save £3,439 GBP (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £6,841 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5563217302. Listed at 16 retailers as of November 1, 2026, with a 112% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.20
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle39.9°
OriginNatural
Grading LabGIA
CertificateGIA 5563217302
Dimensions10.47 × 5.51 × 3.54 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cavity, Needle
Top View
10.47 mm5.51 mm1.20 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5563217302
Side View
Table 61.0%Crown 37.5°Girdle: THK-VTKPavilion 39.9°Culet: NoneDepth 64.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £6,841 GBP|Low: £3,068 GBP|High: £6,841 GBP|Avg: £4,275 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 3, 2026
Retailer 12£3,075 GBP
Retailer 9£3,257 GBP
Retailer 3£3,461 GBP
Retailer 8£3,567 GBP
Retailer 4£3,705 GBP
Retailer 11£3,990 GBP
Retailer 10£4,043 GBP
Retailer 14£4,090 GBP
Retailer 15£4,090 GBP
Retailer 16£4,090 GBP
Retailer 17£4,090 GBP
Retailer 5£4,205 GBP
Retailer 7£4,279 GBP
Retailer 2£4,358 GBP
Retailer 6£4,719 GBP
Retailer 13£6,514 GBP
NZ Jewellers£6,841 GBP

29 data points across 17 retailers

16 retailers£3,075 GBP to £6,514 GBP

A
Cheapest Retailer
-
£3,075 GBP
Retailer 2
-
£3,461 GBP
View
Price last confirmed 7 days ago
B+
Retailer 3
-
£3,567 GBP
View
B+
Retailer 4
-
£3,705 GBP
View
B+
Retailer 5
-
£3,990 GBP
View
B+
Retailer 6
-
£4,043 GBP
View
Retailer 7
-
£4,090 GBP
View
Price last confirmed 8 days ago
B
Retailer 8
-
£4,090 GBP
View
Retailer 9
-
£4,090 GBP
View
Price last confirmed 8 days ago
B
Retailer 10
-
£4,090 GBP
View
B+
Retailer 11
-
£4,205 GBP
View
B+
Retailer 12
-
£4,279 GBP
View
B+
Retailer 13
-
£4,358 GBP
View
B
Retailer 14
-
£4,719 GBP
View
B
Retailer 15
-
£6,514 GBP
View
Most Expensive
NZ Jewellers
1162b1b2-e4ea-4f5a-bd01-41477d5065c0 · Oct 30
£6,841 GBP
$9,157 USD
View
Price last confirmed 7 days ago
15 more retailers have this diamond
Prices start from £3,075 GBPSave up to £3,439 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.20ct Marquise
£3,075 GBP